AT16707U1 - Portable device for administering a gas mixture during cardiopulmonary resuscitation of a patient - Google Patents

Abstract

A portable ventilator or device (10) for administering a mixture of oxygen, argon or optionally other gases to patients suffering from ischemia as a result of cardiac arrest comprises at least one cylinder (12) which contains the mixture of oxygen, argon and possibly other gases; a valve (13) which is assigned to the cylinder (12) and is suitable for operating a first pressure reducer of the gas mixture which emerges directly from the cylinder (12); a control unit (14), which is designed as a PLC, in which programs and algorithms are stored which control the function of the device (10); and a second pressure reducer and a control system (16) of the gas mixture discharged through the cylinder (12) and coming from the first pressure reducer (13), both controlled by the PLC; wherein the device (10) is suitable for supplying the gas mixture with the reduced pressure, which is supplied by the second pressure reducer and by the control system (16), to the patient via a mask (17) which is located in a partial space (18) of the Device can be accommodated

Description

description

The present utility model relates to the field of medical devices that can be used in cardiopulmonary resuscitation or cardiopulmonary resuscitation, typically a heart injury and brain injury of a patient, which is caused by ischemia and / or a blocked or reduced blood flow to the brain, which follows cardiac arrest, and in particular it is the object of the utility model to provide a device having features of portability so as to be immediately and easily operable when necessary to to administer to a patient, by means of a breathing mask which is applied to his or her face, a special gas mixture comprising oxygen and argon or oxygen and argon and other gases.

STATE OF THE ART

Cardiopulmonary resuscitation, which is also referred to by the abbreviation CPR, is an emergency procedure that combines breast compression with artificial ventilation of the lungs in order to maintain brain and heart function by performing manual or mechanical activities until other measures can be taken to restore spontaneous and normal blood circulation in a person affected by cerebral ischemia, which usually follows cardiac arrest.

In particular, cardiopulmonary resuscitation or CPR is indicated for people in the event of cardiac arrest and subsequent ischemia who do not respond and do not even breathe or have abnormal breathing.

As part of the emergency procedure, which is supported by cardiopulmonary resuscitation, devices that are also referred to as CPR ventilators or simply as ventilators are known and continue to be used, which are suitable for a gas mixture that typically contains oxygen to deliver to the lungs of a patient affected by ischemia to provide him or her with oxygen and maintain brain function and, in combination with manual or mechanical compression of the chest, to achieve cardiopulmonary resuscitation in the shortest possible time support.

In particular, the gas mixture containing oxygen is administered into the patient's lungs via a special breathing mask which is applied to the face by an operator of the device, or via intubation into the trachea.

The gas mixture containing oxygen must be administered to the patient as soon as possible when the ischemia following cardiac arrest occurs, thereby blocking blood flow to the brain.

These devices should also be suitable to be operated by operators without special preparation and training, taking into account unexpected situations and emergency situations in which they are normally used.

On the other hand, devices for cardiopulmonary resuscitation or CPR ventilation devices must offer functions which enable trained persons and in particular medical personnel to intervene selectively and with different approaches, in particular depending on the circumstances and the injuries to the patient.

It is also apparent that the immediate availability of the CPR ventilator at the time of the clinical event is of fundamental importance, especially when the use of the correct mixture to be administered to the patient is critical.

Cardiac arrest is a dramatic clinical event that occurs suddenly and

often occurs without warnings.

This clinical event is characterized by a sudden loss of consciousness caused by the lack of blood flow to the brain, which takes place when the heart stops pumping blood to the brain.

As indicated by various sources, cardiac arrest is one of the major causes of death in the western world, affecting between 350,000 and 700,000 people who suffer cardiac arrest each year in the United States, Canada and Europe.

[0013] Argon was first used by deep-sea divers in the 1930s.

It was later found that argon has a narcotic effect in overpressure conditions and that it has anesthetic properties under normal pressure.

Based on these effects, argon has been used mainly as an inert gas with the function of a screen in many industrial applications and in medical devices.

[0016] In addition, the neuroprotective and cardioprotective effects of argon have been described in numerous documents. In particular, tests are reported in the medical literature which show that argon, together with other noble gases with low anesthetic properties, such as helium and neon, has a cardioprotective effect when used as a pretreatment substance in rabbits that give a 30 -minute occlusion of the anterior left coronary artery.

[0017] It has also been found that the benefit of a mixture of argon / oxygen or argon / oxygen and other gases is greater when the gas mixture is administered to a patient as soon as possible.

However, although prior art documents describe the use and administration of argon as a protective pretreatment in protecting the heart muscle, they do not specifically describe the use and administration of argon for therapeutic purposes or as a therapeutic treatment.

In particular, at the time of registration, to the knowledge of the applicant, no device or ventilator for use in cardiopulmonary resuscitation or CPR was available on the market, which is specifically designed and designed for a mixture consisting of argon and oxygen or from Argon, oxygen and other gases are to be administered to prevent and prevent cardiac and brain injury in a patient affected by ischemia that follows cardiac arrest and also features simplicity, portability, and effectiveness as required in emergency situations where the cardiopulmonary resuscitation device is normally used.

The CPR ventilator, which is the subject of this utility model application, meets the requirements described above and also has small dimensions and features of portability and is suitable for advantageously being included in a medical first aid facility and in particular in the To be located near the defibrillator.

In addition, for completeness, it should be pointed out that the applicant has already presented a European patent application (EP 16183930.3) in this field of application and with regard to the use of the properties and effects of argon in the biological and medical field, which describes a special gas mixture, which mainly comprises oxygen and argon and optionally other gases, and is provided to be administered to a patient as part and in connection with cardiopulmonary resuscitation (CPR) to avoid cerebral and cardiac damage caused by ischemia in the same patient and / or causing blocked or reduced blood flow to his or her brain, following cardiac arrest.

It is therefore the main object of the present utility model to propose and design a new, useful and practical device or a respirator for cardiopulmonary resuscitation, which eliminates the disadvantages according to the prior art, which have been described above, and particularly advantageously the use and enables the administration of a gas mixture containing oxygen and argon, as part and as an adjunct to cardiopulmonary resuscitation in an emergency, which combines chest compression with artificial respiration to prevent and prevent heart and brain injury in a patient, which is affected by ischemia following cardiac arrest.

Another object of the present utility model, which is in any case connected to the previous one, is also a realization of a new device which is suitable to use a mixture comprising oxygen and argon as a concomitant circumstance in an emergency procedure of cardiopulmonary resuscitation which has the characteristics of portability, so as to enable its immediate and easy use for administering the gas mixture to a patient in an ischemic condition following cardiac arrest when necessary.

Another object of the present utility model is that a new device is realized, which can be used in a cardiopulmonary resuscitation procedure and which offers suitable functions which depend on the type and skills of the operator, who will then operate them is appropriate in practice to administer the mixture of oxygen and argon to the patient affected by ischemia, particularly for an untrained operator, a trained operator and a doctor.

The aforementioned objects can be considered as fully accomplished by the device or ventilator for administering a gas mixture in a patient's cardiopulmonary resuscitation, which has the features disclosed by independent claim 1.

Advantageously, the respirator of the utility model is designed to be used by untrained persons, so as to allow everyone in the first minutes after the clinical event, that is, immediately after ischemia has been determined in a patient due to cardiac arrest to administer to the patient the gas mixture comprising oxygen and argon.

In particular, as will be described further below, the ventilator has been developed and designed to be suitable for use in a safe manner by:

[0028] - people without training or special training;

[0029] trained people who arrive at the location of the clinical event, for example with the ambulance, such as volunteers who work as paramedical personnel; and

- specialized operators, i.e. Doctors.

As has already been emphasized, the place where the ventilator of the present utility model is placed and made available to be used when necessary is also of fundamental importance and should be as close as possible to the clinical site Event.

An advantageous solution is, for example, that the ventilator is placed near the defibrillator, which position is believed to be where there are usually many operators who are responsible for treating the patient who is suffering from cardiac arrest is impaired and must therefore be revived.

Obviously, the ventilator should also in ambulances, in the hospital, in

outpatient facilities and clinics, and it should also be designed to obtain permits for transportation on a ship or plane and in general emergency vehicles.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects, features and advantages of the present utility model will become more apparent and apparent from the following description of one of its preferred embodiments, which are only provided by way of non-limiting example with reference to the accompanying figures.

Figure 1 is a three dimensional representation of a device or ventilator according to the present utility model for delivering a mixture of oxygen and argon and other gases to a resuscitated patient.

Figure 2 is a functional block diagram of the device of Figure 1 of the utility model for delivering a gas mixture containing oxygen and argon to the patient during his or her cardiopulmonary resuscitation.

Figure 3 is a flow chart illustrating the use and function of the device of Figures 1 and 2 to deliver a gas mixture during the patient's cardiopulmonary resuscitation.

DESCRIPTION OF A PREFERRED EMBODIMENT OF THE DEVICE OR VENTILATOR ACCORDING TO THE MODEL

As expected, the object of the present utility model is a new, useful and advantageous device or ventilator, which is intended for use in cardiopulmonary resuscitation, which is also denoted by the abbreviation CPR, that is, it is suitable for to ventilate and apply a gas mixture to a patient's lungs while the latter is being resuscitated, and for this reason it is also referred to as a CPR ventilator.

According to a first main feature of the present utility model, the gas mixture which is administered to the patient by means of this device or this CPR ventilator during a resuscitation comprises in particular oxygen and argon or oxygen and argon plus other gases in order to Prevent and avoid injury to the patient caused by ischemia and / or reperfusion following cardiac arrest.

In particular, the utility model is based on the finding that the administration of argon through the respiratory system, accompanied by the techniques and procedures of cardiopulmonary resuscitation to a person affected by cardiac arrest, effectively both the cells of the myocardium and the neurons Protects cells from injuries caused by ischemia and / or reperfusion following cardiac arrest.

According to what is proposed by the utility model, the administration of argon together with and at the same time as the standardized manual operations and activities associated with cardiopulmonary resuscitation advantageously enables improved and more effective heart protection together with improved and more effective neuroprotection compared to the administration of argon alone after cardiopulmonary resuscitation.

It should be repeated that according to a further advantageous feature of the utility model, the device or the CPR ventilator has features of portability and simplicity of use, in order to allow the gas mixture containing argon to be administered to the patient immediately and simply at the time of the clinical event or when the patient is exposed to ischemia following cardiac arrest.

[0043] Cardiopulmonary resuscitation is known to typically include manual or mechanical breast compression along with ventilation or with inhalation and delivery of air into the patient's lungs, or only breast compressions.

Advantageously, the CPR ventilator of the present utility model is provided so that it can also be used during these resuscitation activities, that is to say during the patient's breast compression and expansion, as schematically represented by a double arrow CPR in FIG. 2 is.

In a similar manner to that provided by the prior art, the gas mixture can also be applied passively and administered, the flow of the gas being introduced into the breathing system of the patient to be resuscitated by means of a tube.

There are examples of this application when the flow of gas through a nasal tube or mask is administered directly into a supraglottic device or into an endotracheal tube or with jet or oscillatory ventilation.

In summary, in the context described above, the device or ventilator of the utility model fulfills the task of providing forced ventilation with a protective gas mixture containing argon to a patient during cardiopulmonary resuscitation at the location of the clinical event until arrival of the patient in an emergency room of a hospital.

Therefore, the CPR ventilator can also be used to monitor the cardiac circulation of the patient both during the execution of the activities that are intended for cardiopulmonary resuscitation and later when the patient arrives in a hospital facility, which with first aid and intensive care services is provided to protect and reactivate.

As has been emphasized, the CPR ventilator is specifically configured to deliver a mixture of oxygen and argon or of oxygen, argon and other inert gases to the patient suffering from ischemia, the concentration of argon being a mixture consisting exclusively of Argon and oxygen exist, preferably between 20 and 80% of the volume.

In addition, as already indicated, the gas mixture can also contain other gases such as: helium, krypton, neon, xenon, nitrogen, hydrogen, and in this case the preferred concentration of argon is above 10%.

The CPR ventilator of the utility model is equipped with a battery to ensure a ventilation time with the gas mixture of the patient to be resuscitated between 30 minutes and 2 hours, preferably between 30 and 60 minutes.

If there are sockets (e.g. in an ambulance), the ventilator can be charged or operated continuously via the mains.

In particular, as is described here in detail, this ventilation is created and implemented on the basis of a storage system in which the gas mixture in which argon is contained is stored in order to continue and transport it along a pneumatic circuit until it is fed to an interface to the patient, wherein this interface can be configured from a nose or face mask or also a connector that can be connected to a corresponding connector that is assigned to an endotracheal tube.

The CPR ventilator is also equipped with a system to limit the pressure of the respiratory system in order to avoid damage due to overpressure in the patient's lungs; a pulmonary pressure indicator and a number of analog and digital indicators that indicate the correct functioning of the CPR ventilator, which in turn

corresponds to the patient's regular breathing rhythm during cardiopulmonary resuscitation.

In addition, the CPR ventilator of the utility model is advantageously portable, is powered by batteries, can also be powered externally with a connection to an electrical system and can be connected to a defibrillator module.

[0056] Here too, as described below, the device of the utility model was developed and designed in order to be used safely on the basis of different and unambiguous operating modes, in particular by:

- People without training or specific instruction, according to a mode of operation referred to as "simple option";

- trained persons who, for example, come to the location of the clinical event in which the patient is suffering from a cardiac arrest by an ambulance, or volunteer medical personnel, according to a mode of operation of the device, which is referred to as an "intermediate option";

- medical personnel, according to an operating mode, which is referred to as an "advanced option".

Taking into account these possible different operating modes of the device, the breathing process of the patient can be carried out by a qualified doctor, e.g. using a USB stick, and is instead fully automatic if the device is used by non-medical personnel.

As expected and shown in Fig. 1, the utility model CPR ventilator has a light structure and is reduced in size to have portability features.

In particular, the CPR ventilator is designed to have dimensions and weight that are suitable for its convenient and easy transportation on an operator's shoulders.

For example, referring to Fig. 1, the indicative dimensions of the CPR ventilator, without the cylinder or additional cylinders, which contain oxygen and are intended for specific uses, as described below, according to the "advanced option", reserved for doctors:

[0064] - L1 = 1400 + 100 mm; - L2 = 600 + 150 mm; - L3 = 250 + 150 mm. The intended weight is preferably less than 5 kg.

The above dimensions and weights are of course not binding and can be changed depending on the application for which the CPR ventilator is intended.

In detail, with reference to Figure 1 and the corresponding work block diagram of Figure 2, the device or portable ventilator which is the subject of the present utility model is designated by 10 everywhere and includes:

[0070] - a tubular support frame 11 which holds the various parts of the device or ventilator 10;

- at least one cylinder, designated 12 and containing a gas mixture M, which comprises oxygen and argon (O + A) to be administered to the patient P while he is being resuscitated;

[0072] - a valve 13, which is assigned to the cylinder 12, which is normally in a

closed state is arranged to prevent the gas mixture M from escaping from the cylinder 12, this valve 13 being suitable to act as a first pressure regulator of the gas mixture M when it emerges and is supplied directly from the cylinder 12;

A control unit 14, in particular consisting of a PLC, in which programs and algorithms are stored, which aim to control and control the function of the device 10;

- A second pressure reducer and a control system, indicated at 16 everywhere, of the flow of the gas mixture M supplied by the cylinder 12 and coming from the first pressure reducer 13, the second pressure reducer and the control system 16 both being provided to be controlled by the control unit 14 to become; and

A setting and control field 15, which is assigned to the control unit 14, in order to enable an operator to set and control the flow of the gas mixture supplied by the device 10, this setting and control field 15 in turn being a visualization or Display 15a includes, which is suitable for visualizing signals and information about the functioning of the device 10 to the same operator.

In addition, the device 10 of the utility model is intended for use in the most varied of locations for the supply by a battery, which is denoted by 21 in FIG. 2, this battery 21 being dimensioned such that it is functional the device 10 and a flow of the gas mixture M is guaranteed for a period of 30 to 60 minutes and is rechargeable, so that it can be connected to a conventional charger, for example one already installed in an ambulance.

When using the device 10, the visualization or display 15a, which is contained in the setting and control panel 15, is suitable to generate a visual signal "OUT OF OPERATION" when the battery 21, the device 10 with power is supplied, discharged and therefore cannot supply any energy.

More specifically, this "OUT OF OPERATION" message is automatically generated and appears on the display 15a when there is no more energy in the battery 21, while when the charge in the battery 21 of the device 10 is sufficiently large, the Display 15a does not represent a display and therefore appears black or, in another version, the word "ACTIVE" or a similar designation appears.

In addition, the display 15a of the setting and control panel 15 has the function of visually indicating to the operator before the start of the administration of the gas mixture to the patient to be resuscitated or already resuscitated that everything works correctly in the device 10 and is therefore ready for use .

The device 10 is also assigned a breathing mask 17 which can be accommodated in a subspace 18 formed in the same device 10 in order to supply the resuscitated patient with the gas mixture M at reduced pressure, which is supplied by the second pressure reducer and the control system 16.

This subspace 18, which is formed in the device 10, has sufficient space for accommodating and accommodating both the breathing mask 17, which is required for the administration of the gas mixture M supplied by the cylinder 12 to the patient, and one Flexible hose, which is characterized by 19 and connects the breathing mask 17 with the control system 16 of the flow of the gas mixture to be administered to the patient.

The cylinder 12, which contains the gas mixture of oxygen and argon, is preferably made of composite material in order to have a lower weight in favor of the portability and portability of the device 10.

71717

In general, this cylinder 12 can be manufactured and coated with any type of material, provided that the material that comes into contact with the gas mixture M contained in the cylinder 12 is compatible with it.

The pressure of the gas mixture in the interior of the cylinder 12 can reach up to 450 bar and is preferably around 300 bar.

The content of the cylinder 12 containing the gas mixture varies from 0.5 to 3 liters of geometric volume and preferably corresponds to 2 liters in order to contain up to 800 liters of gas mixture at an operating pressure of 450 bar.

The valve 13 assigned to the cylinder 12 can be manufactured as a commercially available valve or can preferably be designed and dimensioned such that a flow of a predetermined rate and a predetermined extent is made possible at a specific final pressure of the gas mixture M emerging from the cylinder 12 in order to so to work as a pressure reducer.

Preferably, the pressure of the gas mixture M after the valve 13, ie at the outlet of the cylinder 12, is between 1 and 10 bar.

As already mentioned, the gas mixture contained in the cylinder 12 contains at least 20% oxygen.

In the case of the "advanced option", this gas mixture is preferably enriched with oxygen and can, for example, reach a concentration of 50% oxygen or higher with the remaining argon gas.

The same methods by which a mixture is obtained which is enriched with oxygen in a variable manner can also be applied to the mixtures of other gases.

The gas mixtures which are administered to the patient can only contain argon and oxygen, or, as already stated, can be gas mixtures which contain argon, oxygen, nitrogen, hydrogen, xenon, helium, krypton, neon in various concentrations, with the premise that the operation of the ventilator 10 does not depend on the specific composition of the gas mixture administered to the patient being resuscitated.

In particular, as also described below, the concentration of the oxygen to be administered to the patient should not be changed and corresponds to the concentration of the oxygen in the gas mixture contained in the bottle 12 when the device or the ventilator 10 is set is to work on the basis of the "simple option" or "intermediate option".

Instead, in the case of the "advanced option" intended for doctors, the oxygen concentration can be adjusted accordingly by the same medical personnel.

When using the device 10, the flow of the gas mixture M, which exits the cylinder 12, even if it has already been reduced in pressure by the valve 13 in the open position, enters a zone or a part of the device 10 where the pressure and rate of this stream can be controlled more precisely.

In particular, this part of the device 10 comprises a series of devices which enable precise and efficient control of the flow of the gas mixture M as a function of the characteristics of the patient P's breathing during the resuscitation.

The control unit 14 is also accommodated in this part of the device 10, i.e. the PLC that controls the operation of the same device 10.

The remaining part of the device 10, which remains free and not from the cylinder 12, the control unit 14 and the second pressure reducer and control system 16 of the flow of the

Gas mixture M is used to define and form the subspace 18 in which the respirator 17 and the flexible hose 19 can be accommodated, which connects them to the second pressure reducer and control system 16.

The breathing mask 17, which is associated with the device or the respirator 10 and is housed there, usually corresponds to a "basic model" so that the operator can easily operate it, and in particular does not require any application to be perfect on the face the patient's liability.

In this way, i.e. the provision of a breathing mask 17 of the normal type and standard, which is therefore easy to use without special skills, prevents untrained persons, in particular if the ventilator 10 is intended for operation and use according to the "simple option", from pneumatic damage on the patient’s internal organs.

Thus, the differences in the features and performance of the ventilator 10 of the utility model also relate when it is intended to operate based on the "simple option" compared to when it is intended to operate based on the "Intermediate option" also works on the type of mask that can be used by the operator of the same ventilator 10.

In particular, the breathing mask, which is provided when using the ventilator 10 according to the "intermediate option", can be accommodated in a corresponding special compartment that is formed in the ventilator 10, accompanied by a warning that is visible on the same ventilator 10, such as "THIS MASK CAN ONLY BE USED BY MEDICAL PERSONNEL" or a similar warning.

Instead, the breathing mask, which can be used in the case of the "simple option", is already connected to the respective flexible hose, which connects it to the second pressure reducer and the control system 16 of the ventilator 10.

Referring now to the drawings, and particularly to the work block diagram of Fig. 3, the use and operation of the device 10 according to the utility model for the administration of the gas mixture M (O + A) containing oxygen and argon to a patient described in the state of cerebral ischemia during his cardiopulmonary resuscitation.

In order to make the operation of the device or the ventilator 10 simple and direct by the respective operator, the various operations that are to be carried out for its correct functioning and its rapid use on the patient in a state of cerebral ischemia are briefly described and symbolically depicted on a panel 20, which is part of the same device 10, as shown in FIG. 1.

Specifically, the operations that must be performed by an operator when a patient is affected by cerebral ischemia, which typically occurs after cardiac arrest, and why, as in blocks 31, 32 and 33 in FIG. 3 the operator accesses and uses the device or ventilator 10 of the utility model, the following:

- Opening the valve 13 associated with the cylinder 12 to allow the free delivery of the gas mixture M from the same cylinder 12;

- placing a command button 15b, as shown in Fig. 1, in a standby position, which is present in the setting and control panel 15 of the ventilator 10;

- Checking the signal on the display 15a of the setting and control panel 15, which indicates that everything works properly in the ventilator 10;

- Selecting the size of the patient P to be resuscitated using the setting and control panel 15 and pressing the corresponding figure shown on the same control panel 15;

- Applying the breathing mask 17 on the face of the patient to be resuscitated P; and

- Placing the command button 15b from the standby position into a position of an instruction for the ventilator 10th

As already mentioned, the correct order of the operations to be carried out, as described above, is expediently indicated on the same device 10 and can also be carried out by a recorded voice.

In general, these operations, which correspond to a block 34 in FIG. 3, have the purpose of adjusting the ventilator 10 until it is activated, in order to administer the gas mixture M to the patient in a state of cerebral ischemia which is so rapid needs to be revived as possible.

It is stipulated that the valve 13 associated with the cylinder 12 is preferably of a special type which is not adjustable, so that it can only be brought from the initially closed position to an open position in which the valve 13th is completely open, and once it has been arranged by the operator of the ventilator 10 in the open position, it can no longer be returned to the closed position.

In this way, a malfunction of the valve 13 is avoided in the excited moments in which measures to activate and use the ventilator 10 on the patient are taken.

The selection of the body size of the patient P regulates and automatically determines the flow of this gas mixture M on the basis of the algorithms and programs stored in the PLC of the control unit 14.

After completion of the preparation phase, the device 10, as indicated by a block 36 in Fig. 3, is activated to work according to the specific mode of operation according to the type and skills of the respective operator to match the patient P. with its cardiopulmonary resuscitation, which is symbolized by the double arrow CPR in FIG. 2, to administer the gas mixture M, which contains oxygen and argon, in order to avoid cerebral and neurological damage to the patient P.

Thus, when the device 10 is activated to operate according to the "simple option" mode of operation, it will administer the gas mixture M based on the program stored in the control unit 14, which actually corresponds to this "simple option", as shown in blocks 37 and 37-1 in FIG. 3.

Instead, if the device 10 is activated to operate according to the mode of operation corresponding to the "intermediate option", it will mix the gas M based on the program stored in the control unit 14 corresponding to this "intermediate option", such as it is indicated in blocks 38 and 38-1 in Fig. 3.

Finally, when the device 10 is activated to operate according to the mode of operation corresponding to the "advanced option", it will mix the gas M on the basis of the program stored in the control unit 14 according to this " advanced option "as indicated in blocks 39 and 39-1 in Fig. 3.

As already shown in advance, the basic difference between the so-called option "simple option" and the so-called option "intermediate option" corresponds to the difference in the type of mask, the untrained staff, corresponding to the "simple option", and the trained staff , according to the "intermediate option", for administering the gas mixture M, which contains oxygen and argon, to the patient P.

In addition, there are other important differences that distinguishes the so-called, reserved and reserved usage option "advanced option" from the other two usage options "simple option" and "intermediate option" for unskilled or for intermediate level trained.

In particular, doctors or other persons and professional persons who have been specially trained or who are legally responsible for the use of the ventilator 10 have a further, additional and separate device in relation to the device or the ventilator 10, which if necessary can be connected to this.

[00124] In detail, this further device or an additional part of the ventilator 10 consists of:

- an oxygen-containing cylinder or a cylinder containing a mixture of oxygen-enriched gas; and

- A special software key or software stick, in which a program for managing this further device or this additional part is stored in relation to the ventilator 10.

This additional and independent part is not intended to be attached to the ventilator 10, but is usually worn by doctors or in any case by trained persons who arrive at the location of the clinical event to support the patient and revive, for example with an ambulance.

Similar to the cylinder 12, which is already present and an integral part of the device 10, this additional cylinder, which contains an enriched oxygen mixture, is made with composite material in order to have a minimal weight.

The operating pressure in this additional cylinder can reach up to 450 bar, but is preferably around 300 bar.

In use, the additional cylinder can be connected to the device or the respirator 10 in a very simple manner and is equipped with a corresponding pressure reducing valve which is configured in such a way that it functions like the valve 13 assigned to the cylinder 12, which controls the gas mixture M contains argon and is an integral and essential part of the ventilator 10, so that this pressure reducing valve is only arranged in two positions "open" and "closed" and once opened it can no longer be closed.

Via the software key or software stick, the doctor has access to a large number of different functions which are managed by the PLC of the control unit 14 of the respirator 10, and can thus, for example, the oxygen concentration in the mixture M to be administered to the patient P, the pressure when dispensing and administering the same mixture M, the flow rate and the relative administration times vary.

Here, too, access to the PCL enables the doctor to advantageously use the ventilator 10 during the breast compression massages, which take place during cardiopulmonary resuscitation, in order to exhale air from the lungs and to breathe air during the subsequent recovery phase.

Here, too, the program or software which enables the doctor to access the resources of the PLC of the control unit 14 can be loaded into a tablet or tablet computer.

As soon as the tablet is connected to the ventilator 10 in USB or Bluetooth mode, the commands for the PLC can be entered by the doctor via the touchscreen of the same tablet, on which the parameters of the ventilator 10 can also be displayed.

From the description it appears that the present utility model completely meets the objectives set and in particular a new and useful device or

Respirator for administering a gas mixture containing argon in particular, in connection with and in connection with the cardiopulmonary resuscitation of a cardiac arrested patient, proposes to treat cardiac and cerebral lesions caused by ischemia and / or blocked or reduced blood flow to the brain in the same patient to avoid and prevent.

In addition, the device has features of portability to enable simple and immediate use when necessary in the cardiopulmonary resuscitation of a patient affected by ischemia after cardiac arrest.

VARIANTS

Of course, without affecting the principle and the basic technical concepts of the present utility model, it is also clear that the device or the respirator for administering a gas mixture in cardiopulmonary resuscitation, for heart caused by ischemia or by blocked or reduced blood flow after cardiac arrest - To avoid and prevent brain lesions in a patient, may be the subject of variants, changes and improvements compared to what has been described and illustrated so far, without thereby deviating from the scope of the same utility model.

For example, based on a first variant, the ventilator can integrate a CO »detector, which can be useful to avoid hyperoxygenation of the patient during the resuscitation phase.

As already shown, the gas mixture administered to the patient can contain, in addition to oxygen and argon, other gases, such as helium in particular.

In this case, the gas mixture may consist of oxygen in a percentage of at least 21%, argon preferably in a percentage of more than 10% and helium, as a function of balancing, to obtain a lighter mixture that is slightly breathable and therefore can make breathing easier in certain patients.

It is clear that in this case the appropriate way of providing helium in the composition of the gas mixture is determined by the low molecular weight of this gas, which means that the gas mixture administered to the patient can be easily breathed.

Here, too, the CPR ventilator can be designed so that it can easily pass the approval tests for transport in an airplane or helicopter.

Finally, as already illustrated, the construction and configuration of the ventilator can be such that it can be carried like a backpack or by hand like a bag.

Claims (15)

Expectations A device or ventilator (10) for administering a gas mixture (M, (O0 + A)) as part or as a concomitant to cardiopulmonary resuscitation (CPR) of a patient (P), comprising: - a holding frame (11) to hold the various parts of the device (10); - At least one cylinder (12) containing a gas mixture (M) comprising oxygen and argon (O + A) and to be administered to the patient (P) while he or she is being resuscitated; - A valve (13) which is associated with the cylinder (12) and is normally arranged in a closed state to prevent the gas mixture from escaping from the same cylinder (12), the valve (13) being able to a first pressure reducer of the gas mixture to operate when the valve (13) is open and therefore the gas mixture (M) exits and is supplied from the cylinder (12); - A control unit (14), which is in particular formed by a PLC and in which programs and algorithms are stored which are intended to control and monitor the function of the device (10); - A second pressure reducer and a control system (16) of the flow of the gas mixture (M) which is fed through the cylinder (12) and comes from the first pressure reducer (13), both being controlled by the control unit (14); - A setting and control panel (15), which has a visualizer or a display (15a) to enable an operator to set and operate the device (10); and - a battery (21) to supply the energy necessary for the operation of the device or ventilator (10); the device (10) of a mask (17) or breathing mask or similar device device is associated with which it is suitable, the patient (P), who revives the gas mixture (M, (O0 + A)) with the reduced pressure, which is replaced by the second Pressure reducer and is supplied by the control system (16), which in the same pre direction (10) are to be administered. 2. The device or ventilator (10) of claim 1, wherein the device or ventilator (10) is configured to operate in various modes or work options (37, 38, 39) as a function of the characteristics, skills, and type of personnel available to use the same device or ventilator (10) to deliver the gas mixture (M, (O + A)) to the patient (P), the various work options or modes of operation comprising: - a first option (37), which is referred to as a “simple option”, in which the device (10) is provided for use by non-trained and non-specialized personnel without the risk of causing harm to the patient , in the first option (37) the control unit (14, PLC) functions as the device (10) controls (37-1) based on a predetermined and special program, which actually corresponds to the first option in order to obtain an adequate current of the Gas mixture (M) with an appropriate pressure to generate a pneumatic Avoid harm to the patient even in the event of tracheal blockage; a second option (38), which is also referred to as an “intermediate option”, in which the device (10) is present in order to be used by trained personnel, with the second option (38) the control unit (14, PLC) the function of the device (10) based on a specific and special program according to the second Option controls (38-1) to provide an appropriate flow of gas with a corresponding generate sufficient pressure to the patient using a mask from a professional Type to be administered; and a third option (39), which is also referred to as an “advanced option”, in which the device (10) is present for use by medical personnel, the third option (39) enables medical personnel to assist in play in a Bluetooth mode or by means of a USB connection to the operating tel and the programs stored in the control unit (14) and in the PLC to access the flow of the gas mixture (M) to be administered to the patient (P) and the corresponding pressure and also the concentration of oxygen to be selected and set in the same gas mixture (M) if a further additional cylinder which contains oxygen is connected to the same device (10). The device or ventilator (10) according to claim 1 or 2, wherein the valve (13) associated with the cylinder (12) is adapted from the closed position to which it is normally set to release the gas mixture (M) of the cylinder (12) can only be set to a certain open position without being subject to regulations by the operator of the device to allow the gas (M) to be released freely by the cylinder (12) allow, and wherein the valve (13), once it has been set in the open position, can no longer be closed in the closed position in order to avoid incorrect operation by the operator during use of the device (10). 4. Device or respirator (10) according to any one of claims 1-3, comprising a partial space (18) which has sufficient space to both the breathing mask (17), which is necessary to the patient the gas mixture (M, ( O + A)), which is contained in the cylinder (12), and a hose (19), which the breathing mask (17) with the second pressure reducer and the control system (16) of the flow of the gas mixture (M), which is administered to the patient (P) by the device (10) connects, receives and accommodates. 5. The device or ventilator (10) according to one of claims 1 to 4, wherein the at least one cylinder (12) has a volume which comprises between 0.5 and 3 I, preferably 2 I, and is dimensioned and designed to be suitable to be able to work at up to 450 bar and up to 800 | to contain the gas mixture (M) under pressure. 6. Device or respirator (10) according to one of claims 1 to 5, wherein the setting and control panel (15) enables the operator of the device to the flow of the gas mixture (M), which is contained in the cylinder (12) to be administered to the patient (P) based on the size of the same patient (P). 7. The device or respirator (10) according to one of claims 1 to 6, further comprising access, in particular via Bluetooth or a USB mode, to connect the same device (10) to an external communication device, for example a tablet to enable commands to be sent to the control unit (14) and the corresponding PLC, which are designed to change the setting parameters of the device (10). 8. The device or ventilator (10) according to any one of claims 1 to 7, wherein the battery (21) is designed to enable the device (10) to function for at least 30-60 minutes and is suitable to be charged by being connected to an ordinary battery charger, particularly those already in the ambulance, and to generate energy immediately when it is being charged; and wherein the display (15a) present in the setting and control panel (15) is configured to when the device (10), for example because the battery (21) is discharged, is not being used and is not being used is in operation to visualize a corresponding message, for example "OUT OF SERVICE". 9. The device or ventilator (10) according to any one of claims 1 to 8, furthermore full: - A connection for an additional cylinder in a composite which contains a gas mixture which is enriched with oxygen and in which the oxygen is present in a concentration of more than 21%. 10. The device or respirator (10) according to one of claims 1 to 9, wherein the valve (13), which is assigned to the cylinder (12) and is operated as a first pressure reducer, is suitable for the pressure in the gas mixture (M) from a high pressure present in the same cylinder to a reduced pressure at the outlet of the latter so as to enable the gas mixture (M, (O + A)), appropriately the second pressure reducer and the control system (16) of the stream of the gas mixture (M, (O + A)) to be supplied and therefore to be administered to the patient (P) with the required pressure of the gas mixture (P) during a resuscitation. 11. The device or ventilator (10) according to any one of claims 1 to 10, the following Features: - a weight of less than 5 kilos; - Dimensions and a design so that it is possible to carry the device (10) easily on the shoulders or by hand; - a battery (21) so as to allow the device (10) to operate for up to 120 minutes; - A connection to an electrical system to enable the battery (21) to be recharged or the device (10) to continue to function. 12. The device or respirator (10) according to any one of claims 1 to 11, wherein the cylinder (12) containing the gas mixture (M, (O + A)) to administer to the patient (P), in unalloyed steel or in an aluminum alloy or in a composite with an inner lining in a metal, aluminum or steel or in a polymer composite. 13. The device or ventilator (10) according to any one of claims 1 to 12, further comprising means for connecting the device to an endotracheal tube. The device or ventilator (10) according to any one of claims 1 to 13, further comprising means for detecting and measuring carbon dioxide (CO>) in the patient's blood (P) to avoid hyperoxygenation. 15. The device or respirator (10) according to any one of claims 1 to 14, wherein the device or respirator (10) is suitable to the gas mixture (M) contained in the cylinder (12), also in the case of a Failure to administer the battery (21) by using an additional auto-resuscitation device, which is suitable to allow manual ventilation of the patient who is to be resuscitated. Two sheets of drawings